Inner lining and reenforcement for pneumatic tires



F. X. SCHULER. INNER LINING AND REENFORCEMENT FOR PNEUMATIC TIRES.

Patented Mar. 7, 1922.

UNITED STATES FRANCIS X. SGHULER, 013 FORT WORTH, TEXAS INNER LINmG- AND REENFORCEMENT FOR PNEUMATIC TIRES.

Specification of Letters Patent.

Patented Mar. 7, 1922.

Application filed August 18; 1921. Serial No. 493,419.

To all to lwm it may concern:

Be it known that I, FRANCIS X. SOHULER,

a citizen of the'United States, residing at Fort Worth, in the county of Tarrant and State of Texas, have inventednew and useful Improvements in Inner Linings and Reenforcements for Pneumatic Tires, of which the following is a specification.

This invention relates to pneumatic tires and more particularly to an inner lining and reenforcement.

' In the use of pneumatic tires, it is the .custom to interpose a relatively thin sheet of leather, canvas, rubber or other similar material, such as an especially prepared sheet ofbfabric, between the casing and the inner tu e. creeps on the inner wall of the-casing, re-.

sulting in undue Wear, and because of the frictional resistance between the interposed sheet and the inner wall of the casing, the temperature of both the sheet and the casing is raised to such a point as to greatly shorten what is believed to be a much longer life of the casing. Moreover, these thin linings are forced by the air pressure within the inner tube into blowout fractures in the easing and thereby become torn or cut by the walls of such fractures. Both the casings and the inner tubes are expensive and how to prolong the life of both under working conditions has given the trademore or less concern, and especially since experiments have demonstrated the objectional'features to be eliminated, there must be employed some means as will overcome same and yet not destroy thenecessary resiliency which the tires must possess to satisfy easy riding conditions.

This interposed sheet of material sides in providing a relatively thick and strong lining for interposition between the casing and tube so as to aid in the preven: tion of punctures, and yet not destroy the requisite resiliency required in pneumatic tires.

With these and other objects in View, the invention consists in the novel construction, combination and arrangement of parts hereinafter fully described, illustrated in the accompanying drawings and pointed out in the claim hereto appended, it being understood that various changes in the form, proportion and .minor details of construction, within the scope of the claim, may be resorted to without departing from the spirit or sacrificing any of the advantages of the invention:

Referring to the drawings:

Figure 1 is a fragmentary perspective View of the invention.

Figure 2 'is a transverse sectional View.

Referrin accompanying drawing'sfihe reference charnow more 1 particularly to the.

acter 3 indicates an'outer shoe creasingof 7 any character, adapted for pneumatic tire purposes and the; numeral 4 indicates an infiatable tubeof any well-known make orval g' I 1 y improved lining and reenforce'ment 5 j is composed preferably of light quality pure gum so as to provide for necessary resili-- \ency, and, as shown, it is substantially U- shaped in cross-section with its connecting.

It is, therefore, one of the objects of my\ as will be hereinafter explained. The thick' It is another object of my invention to provide a lining for use in the position between'the casing and tube embodying among 1 other characteristics, means for creating a vacuum between the interposed material and the casingto on the casing.

.. A still further obiectxof the invention prevent creepingof theflatter I v v v Y jtheir width, hereby'gunder; iri ing condn t ions, a vacuum is iormedggin" portion a is substantially segmental in cross section and presents a plane or-cylindrical (portion of the casing,

inner surface to the inner tubewhichflis-fl'ab tened, as shown in Figure'2, before-inflation so that the air pressure upon inflation w-illnotexcessivelystrain the mner, tube which in inflation is distended fromaflat' to an a proximately" circular {she sectiona y resultin"in"the pompress dn. -of the 'soft rubber se entalP9ition Pockets 6 are I fom n'e'd lie -thi of theflinin'gfi o 1 cludin ."the' up o I of the I ini'ng andyare offagdepth' eater than sid warrpoaieas cause the lining and reenforcement to hold firmly against creeping on the inner wall of the casing.

The results of the use of my lining and reenforcement are; firstly, that creeping of the lining and reenforcement is prevented; secondly, that because of the thickness of the lining or reenforcement, punctures are obviated to a certain extent at least, in that certain length nails and other articles in passing through the casin are prevented from reaching the tube; thirdly, the thickness of the 1in-- thereby reducing expense, as regards the upkeep of tires for the reason that the smaller the tube the less it costs.

What is claimed is: A lining for use between the casing and the inner tube of a pneumatic tire, including a light quality gum and relatively thick segmental ortion presenting an inner cylindrical sur aceto the inner tube and flattening the same beneath the tread of the tire prior to the inflation of the inner tube into approximately circular form to permit the re" quired air pressure to be applied to the inner tube without excessive strain or distension of the material-thereof and to produce the compression of the segmental'portion, said segmental portion being provided in its outer surface with cross sectionally small radially arranged air pockets adapted to create a vacuum between the lining and theeasing to prevent creeping of the lining on the casmg. g

In testimony whereofl have hereunto set my hand.

- FRANCIS X. SCHULER. 

